/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/HierarchyEditor/NiagaraHierarchyViewModelBase.h
An identity can be optionally set to create a mapping from previously existing guids or names to hierarchy items that represent them.
void SetIdentity ( [FNiagaraHierarchyIdentity](API\Plugins\NiagaraEditor\ViewModels\HierarchyEditor\FNiagaraHierarchyIdentity) InIdentity )